Ruthenium‐Based Electrocatalysts for Hydrogen Evolution Reaction: from Nanoparticles to Single Atoms

Small, Journal Year: 2024, Volume and Issue: 20(45)

Published: July 27, 2024

Abstract Benefiting from similar hydrogen bonding energy to Pt and much lower price compare with Pt, Ru based catalysts are promising candidates for electrocatalytic evolution reaction (HER). The catalytic activity of nanoparticles can be enhanced through improving their dispersion by using different supports, the strong metal supports interaction further regulate performance. In addition, single‐atom (SACs) almost 100% atomic utilization attract great attention coordinative atmosphere single atoms adjusted supports. Moreover, syngenetic effects improve performance catalysts. this review, progress HER electrocatalysts summarized according existing forms, including (NPs), (SAs) combination both NPs SAs. common such as carbon materials, oxides, phosphides sulfides classified clarify active centers. Especially, possible mechanisms reasons improved discussed experimental results theoretical calculations. Finally, some challenges opportunities prospected facilitate development HER.

Language: Английский

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Durable Ru Nanocrystal with HfO2 Modification for Acidic Overall Water Splitting

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 16(1)

Published: April 30, 2024

Durable and efficient bi-functional catalyst, that is capable of both oxygen evolution reaction hydrogen under acidic condition, are highly desired for the commercialization proton exchange membrane water electrolysis. Herein, we report a robust L-Ru/HfO

Language: Английский

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Interfacial Design of Ti₃C₂T_x MXene/Graphene Heterostructures Boosted Ru Nanoclusters with High Activity Toward Hydrogen Evolution Reaction

Advanced Science, Journal Year: 2024, Volume and Issue: 11(22)

Published: March 29, 2024

Abstract The development of a cost‐competitive and efficient electrocatalyst is both attractive challenging for hydrogen production by evolution reaction (HER). Herein, facile glycol reduction method to construct Ru nanoclusters coupled with hierarchical exfoliated‐MXene/reduced graphene oxide architectures (Ru‐E‐MXene/rGA) reported. structure, formed the self‐assembly oxides, can effectively prohibit self‐stacking MXene nanosheets. Meanwhile, formation MXene/rGA interface strongly trap 3+ ions, resulting in uniform distribution within Ru‐E‐MXene/rGA. boosted catalytic activity underlying mechanism during HER process are proved density functional theory. Ru‐E‐MXene/rGA exhibits overpotentials 42 62 mV at 10 mA cm −2 alkaline acidic electrolytes, respectively. small Tafel slope charge transfer resistance ( R ct ) values elucidate its fast dynamic behavior. cyclic voltammetry (CV) curves chronoamperometry test confirm high stability These results demonstrate that coupling heterostructure represents an strategy constructing MXene‐based catalysts enhanced activity.

Language: Английский

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Breaking the Limit of Size-Dependent CO₂RR Selectivity in Silver Nanoparticle Electrocatalysts through Electronic Metal–Carbon Interactions

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(23), P. 15301 - 15309

Published: Nov. 10, 2023

We demonstrate that electronic metal–support interactions (EMSIs) between silver and carbon can dramatically improve the CO2 reduction reaction (CO2RR) performance of small Ag nanoparticles. Ag–C EMSIs were created by ultrahigh vacuum deposition onto defect-containing (sputtered) highly oriented pyrolytic graphite, calculations predicted 1.02 e was transferred from to carbon, which stabilized *COOH intermediate, lowered potential-limiting CO2RR step, improved CO2-to-CO performance. Experimentally, we identified a scaling relationship particle size relative EMSI strength, Faradaic efficiency sub-2 nm particles 2 ∼100% increased CO turnover frequency ∼15-fold compared with similarly sized grown in absence EMSIs. extended this concept grow electrocatalysts on commonly used black catalyst supports showed interaction support defects could sustain selectivity comparable larger particles, suggesting an approach for tailoring electrocatalyst

Language: Английский

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Accelerating Ru⁰/Ru⁴⁺ Adjacent Dual Sites Construction by Copper Switch for Efficient Alkaline Hydrogen Evolution

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(45)

Published: Oct. 19, 2023

Abstract The alkaline hydrogen evolution reaction (HER) always needs the nearby dual sites of water adsorption and H 2 generation, Ruthenium‐based electrocatalysts are promising alternatives to platinum‐based materials. However, achieving both high efficiency long‐term stability in construction is still challenging. Herein, Cu‐doped RuO (Cu‐RuO ) reported undergoes instant activation for Ru 0 production at low potential state preceding HER. Cu 2+ ions demonstrated work as switch obtaining activated sample Cu‐RuO ‐AC, which possesses Ru‐RuO structure. ‐AC gives an overpotential only 19 mV current density 10 mA cm −2 with a Tafel slope 32.8 dec −1 . Moreover, mass activity 1 A mg , it 88 mV, lower than 343 commercial 40% Ru/C, or 154 bare (RuO ‐AC). Density functional theory (DFT) calculations reveal that doping activates 4+ two‐electrode H‐cell device ‐AC||Cu‐RuO 1.66 1.78 V versus RHE achieve 100 200 overall splitting. This research can help design more efficient dual‐site HER electrocatalysts.

Language: Английский

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A review on fundamentals for designing stable ruthenium-based catalysts for the hydrogen and oxygen evolution reactions

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Journal Year: 2024, Volume and Issue: 60, P. 68 - 106

Published: May 1, 2024

Language: Английский

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Insights into the pH effect on hydrogen electrocatalysis

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

This review systematically provides various insights into the pH effect on hydrogen electrocatalysis, and thus providing a reference for future development of electrocatalysis based these insights.

Language: Английский

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Highly Dispersed Ru‐Pt Heterogeneous Nanoparticles on Reduced Graphene Oxide for Efficient pH‐Universal Hydrogen Evolution

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 24, 2024

Abstract An efficient and stable electrocatalyst is key for the production of green hydrogen using water electrolysis. However, weak dissociation ability Pt‐based catalysts, resulting in slow kinetics severely hampers its applications alkali medium. Herein, a simple “coincident reduction” strategy reported to grow highly dispersed Ru‐Pt heterogeneous bimetallic nanoparticles on reduced graphene oxide (Ru x Pt y @rGO) pH‐universal evolution. Ru @rGO has superior catalytic activity at all pH values due synergistic effect between ultra‐small nanoparticle. In particular, catalyst with 13.6 wt% noble metal 1 2 low overpotentials 9, 6, 36 mV 10 mA cm −2 m KOH, 0.5 H SO 4 phosphate buffer solution (PBS), respectively, which outperformances monometallic counterparts comparable best catalysts ever reported. The because strong bonding nanoparticle rGO. Mechanism studies show that faster Volmer–Tafel mechanism alkali, high‐efficient + transfer increased adsorption acid, reaction kinetics. This work provides new route mass high‐performance practical values.

Language: Английский

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C₆₀ and Derivatives Boost Electrocatalysis and Photocatalysis: Electron Buffers to Heterojunctions

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(46)

Published: Oct. 27, 2023

Abstract Buckminsterfullerene (C 60 ) and derivatives are significant in the synthesis of efficient electrocatalysts photocatalysts. This is because electron acceptor properties distinctive heterostructure(s) physicochemical characteristics. High‐performance photocatalysts important therefore conversions for clean energy. Here a critical assessment advances use C as heterostructures “electron buffers” catalysts reported. Methodologies preparing composite assessed categorized microscopic mechanisms boosting catalytic performance through materials including, semiconductors, carbon‐based metal‐free materials, metal nanoclusters, single atoms, metal–organic skeletons established. Important characterizations used with derivative composites contrasted practical challenges to development determined. A prospective on future directions likely outcomes high efficiency provided. It concluded that advantageous advanced structural integrity boosted transport. The findings expected be interest benefit researchers manufacturers formation buffer areas significantly performance.

Language: Английский

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Titanium Dioxide and N‐Doped Carbon Hybrid Nanofiber Modulated Ru Nanoclusters for High‐Efficient Hydrogen Evolution Reaction Electrocatalyst

Small, Journal Year: 2024, Volume and Issue: 20(32)

Published: March 20, 2024

Abstract The designing and fabricating highly active hydrogen evolution reaction (HER) electrocatalysts that can superior to Pt/C is extremely desirable but challenging. Herein, the fabrication of Ru/TiO 2 /N‐doped carbon (Ru/TiO /NC) nanofiber reported as a novel HER electrocatalyst through electrospinning subsequent pyrolysis treatment, in which Ru nanoclusters are dispersed into TiO /NC hybrid nanofiber. As support, experimental theoretical calculation results reveal more effectively accelerate water dissociation well optimize adsorption strength * H than NC, thus leading significantly enhanced activity, merely requires an overpotential 18 mV reach 10 mA cm −2 , outperforming alkaline solution. electrolytic cell composed NiFe LDH/NF generate 500 1000 at voltages 1.631 1.753 V, respectively. Furthermore, also exhibits remarkable durability for least 100 h 200 with negligible degradation activity. present work affords deep insight influence support on activity strategy proposed this research be extended fabricate various other types diverse electrocatalytic applications.

Language: Английский

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